[zfs-code] Peak every 4-5 second

2008-07-23 Thread Tharindu Rukshan Bamunuarachchi
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[zfs-code] Peak every 4-5 second

2008-07-23 Thread Tharindu Rukshan Bamunuarachchi
Dear Mark/All, Our trading system is writing to local and/or array volume at 10k messages per second. Each message is about 700bytes in size. Before ZFS, we used UFS. Even with UFS, there was evey 5 second peak due to fsflush invocation. However each peak is about ~5ms. Our application can not

[zfs-code] Peak every 4-5 second

2008-07-23 Thread Robert Milkowski
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[zfs-code] Peak every 4-5 second

2008-07-22 Thread Tharindu Rukshan Bamunuarachchi
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[zfs-code] Peak every 4-5 second

2008-07-22 Thread Mark Maybee
ZFS is designed to "sync" a transaction group about every 5 seconds under normal work loads. So your system looks to be operating as designed. Is there some specific reason why you need to reduce this interval? In general, this is a bad idea, as there is somewhat of a "fixed overhead" associated